Features: Easy to operate. 4 types to select. High accuracy, reliable. High-definition LED display, easy to read. Small size and lightweight, easy to carry with. Specifications: Material: LED Resolution: 0.1 Power Supply: 3.7V Lithium-Battery(Built-in) Measuring Range: Uniaxial: 4x90 Biaxial: 40 Size: Approx. 118x35x20mm/4.65x1.38x0.79in Type: 1/2/3/4 Note: The battery is included. Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: Package 1: 1x Laser Level(Single Laser No Bracket) Package 2: 1x Laser Level(Single Laser with Bracket) Package 3: 1x Laser Level(Double Laser No Bracket) Package 4: 1x Laser LevelDouble Laser with Bracket)